Circulating pump for power units



April 29, 1930. J. s. OECHSLE CIRCULATING PUMP FOR POWER UNITS Filed July 20, 1925 llll INVENTOR fasgp/z/fl Oeciasle,

' ATTORNEY m nta Apr. 29, 1930 ouirsn STATES Josnrn s. OECHSLE, or rnILAnnLrnrA, PENNSYLVANIA, ASSIGNOR 'ro mnranwnnn sEnvrcE CORPORATION, or PHILADELPHIA, PENNSYLVANIA, A GORPORATION 01" PENNSYLVANIA Application filed July 20,

bile; and it has for its primary object certain structural improvements whereby such pumps automatically become thermo-siphonic in action when an interruption or breakdown occurs in the normal forced circulating system.

Another object of this invention is to provide a pump of the typified character which is positive in action, comprises but few parts, and is the acme of efiiciency when associated in the circulating systems of portable power units and the like.

Vith the foregoing and other objects in view, which will be apparent from the following description, this invention essentially consists in the matters hereinafter set forth, typically exemplified by the accompanying sheet of drawings, and circumscribed as to subject matter, as well as scope, by the subjoined claims.

In the drawings: Figure 1-is an end elevation of a circulating pump embed ing my improvements, and more specifically esigned for interposition in the cooling system of a tractor actuated compressor unit; and,

Figure 2is a central vertical section of the same.

Referring more in detail to the drawings it will be observed that the casing member, comprehensively desi nated by the numeral 3, embodiesas a unit-lower and upper chambers 4, 5 respectively, separated by a dividing wall 6, and a depending integral bracket support 7 suitably shaped at 8 for passage of the engine drive shaftnot shown. The aforesaid chambers 4, 5 respectively constitute the intake and outlet of the pump, while the easing 3 is provided with a flange 8 having bolt holes 9, whereby the structure is secured in place. Pipe connections 10, 11, forming a part of the cooling system are fitted into suitably screw-threaded bosses 12, 13, while the inlet chamber 4 is provided with concentric embossments 14, 14 axially apertured at 15 for the friction or similar fitment of a bearing CIRCULATING PUMP FOR POWER UNITS 1925. Serial No. 44,738.

sleeve 16 affording a journal for the pump shaft 17.

The bearing sleeve 16, it will be seen, is reduced at its inner end 18 to receive the correspondingly reduced part 19 of the pump shaft 17, on which the impeller 20 is clamped by means of a lock nut 21. The outer end of the bearing sleeve 16 is fitted with a gland nut 22 that accommodates any suitable Packing 23, while a belt pulley 24 is removably fixed on the outer end of the pump shaft 17.

Referring again to casing 3, it will be observed that the upper chamber 5 is somewhat frusto-pyramidal in formation and that immediately above the dividing wall 6 projecting through the upper portion of the flange 8 is a comparatively small aperture 25 communicating with the inlet connection to the water jacket of the power unit (not shown) with which the pump is operatively associated, the longitudinal axis of this aperture being substantially parallel to that of the pump shaft 17 and the inner end thereof communicating with the outlet 5 of the pump. It will be further observed that this inlet connection of the water jacket is of somewhat elliptical configuration as shown by the dotted line 26 of Figure 1 and that the u per edge thereof rises a sufficient distance a ove the dividing wall 6 to thereby afi'ord direct communication between the inlet opening 26 and the pump outlet 5 through the aperture 25. In the event of an accident happening to the drive of the pump this aperture 25 becomes functional to automatically establish a thermo-siphonic passage in the circulating system in place of the normal circulating connection, and as a result the circulatory system continues unimpeded.

As one example of the use of this pump, it may be assumed that it is included in the circulating system of a tractor engine which in turn is employed to drive a compressor unit. In a system of this sort the pump as hereinbefore described is suitably supported by its bracket 7 between the engine and its radiator. the inlet 4 of the pump being suitably connected to the upper end of the cir culatory system of the engine water jacket, the lower end of this system being connected to the bottom of the engine radiator in the usual manner. The outlet 5 of the pump is connected to the upper end of the engine radiator. The pipe connection 10 of thepump is connected to the inlet of the compressor water jacket and the outlet of the latter is connected to the pipe connection 11 of the pump.

With the connections as ust described and the impeller 2-0 operating, water will be circulated continuously through the engine and compressor as follows:from engine water jacket into chamber 4, thence through pipe connection 10 to and through the compressor water jacket, thence back to the pipe connection 11, and finally through the outlet 5 of the pump into the radiator of the engine for return to the engine Water jacket. It will be understood of course that if the compressor unit is not to be included in the cir- 'culatory system and it is desired to employ the pump in a simple engine cooling system it becomes merely necessary to interconnect the pipe connections 10 and 11 of the pump. The circulatory system would then be the same as above with the exception that instead of sending water from the pipe connection 10 to pipe connection 11 through the compressor water jacket, the water would be passed directly from connection 10 to connection 11.

In operation it will be readily understood that with a pump of my invention interposed in the circulating system of a power actuated unit no matter what happens to interfere with the normal circulatory action of said pump provision is afforded by way of the aperture 25 for a continuance of thermosiphonic circulation, whereby the unit may be continued in operation till such time as the interference can be rectified or eliminated.

Obviously, changes in the form, proportions and minor details, may be made within the scope of my invention Without departing from the spirit of said invention or sacrificing any of its advantages; hence the right is hereby reserved to make all such changes as are reasonably circumscribed by the terms of the appended claims.

Having described my invention what I claim is:

1. In a circulating pump, a casing having intake and outlet chambers, a pump impeller arranged for rotation within the intake chamber, means for completing the path of circulation of a fluid pumped by said impeller from said intake chamber to said outlet chamber, and means for permitting the thermo-siphonic passage of said fluid into said outlet chamber from a point exterior of said intake chamber.

2. In a circulating pump, a casing having intake and outlet chambers, the open ends of which are respectively disposed in planes extending substantially at right angles to each other, said chambers being separated by an intervening wall which commonly constitutes one side of the intake chamber and the bottom of the outlet chamber, said casing being further provided with an opening arranged exteriorly of and paralleling said intake chamber and adapted to afford a pas sage from a point exterior of said intake lghamber to the interior of said outlet cham- 3. In acirculating pump, a casing having intake and outlet chambers separated by an intervening wall extending longitudinally of the pump shaft, said casing being also provided with an opening located exterior-1y of said intake chamber for communication with said outlet chamber" and operative to automatically set u thermo-siphonic circulation in the event of interference happening in the normal circulatory action.

4. In a circulating pump, a casing having intake and outlet chambers separated by an intervening wall extending longitudinally of the axis of said intake chamber, said casing having a relatively small opening in communication with the interior of said outlet chamber, said opening being separated from said intake chamber by said intervening wall.

In testimony whereof I aflix my signature the 6th day of July, 1925.

JOSEPH s. OEOHSLE. 

